Domain Name Associations (DNA) in the Extensible Messaging and Presence Protocol (XMPP)
RFC 7712

Document Type RFC - Proposed Standard (November 2015; No errata)
Last updated 2015-11-19
Replaces draft-saintandre-xmpp-dna
Stream IETF
Formats plain text pdf html bibtex
Stream WG state Submitted to IESG for Publication
Document shepherd Dave Cridland
Shepherd write-up Show (last changed 2015-06-01)
IESG IESG state RFC 7712 (Proposed Standard)
Consensus Yes
Telechat date
Responsible AD Ben Campbell
Send notices to (None)
IANA IANA review state Version Changed - Review Needed
IANA action state RFC-Ed-Ack
Internet Engineering Task Force (IETF)                    P. Saint-Andre
Request for Comments: 7712                                          &yet
Category: Standards Track                                      M. Miller
ISSN: 2070-1721                                      Cisco Systems, Inc.
                                                               P. Hancke
                                                                    &yet
                                                           November 2015

                     Domain Name Associations (DNA)
        in the Extensible Messaging and Presence Protocol (XMPP)

Abstract

   This document improves the security of the Extensible Messaging and
   Presence Protocol (XMPP) in two ways.  First, it specifies how to
   establish a strong association between a domain name and an XML
   stream, using the concept of "prooftypes".  Second, it describes how
   to securely delegate a service domain name (e.g., example.com) to a
   target server hostname (e.g., hosting.example.net); this is
   especially important in multi-tenanted environments where the same
   target server hosts a large number of domains.

Status of This Memo

   This is an Internet Standards Track document.

   This document is a product of the Internet Engineering Task Force
   (IETF).  It represents the consensus of the IETF community.  It has
   received public review and has been approved for publication by the
   Internet Engineering Steering Group (IESG).  Further information on
   Internet Standards is available in Section 2 of RFC 5741.

   Information about the current status of this document, any errata,
   and how to provide feedback on it may be obtained at
   http://www.rfc-editor.org/info/rfc7712.

Saint-Andre, et al.          Standards Track                    [Page 1]
RFC 7712                        XMPP DNA                   November 2015

Copyright Notice

   Copyright (c) 2015 IETF Trust and the persons identified as the
   document authors.  All rights reserved.

   This document is subject to BCP 78 and the IETF Trust's Legal
   Provisions Relating to IETF Documents
   (http://trustee.ietf.org/license-info) in effect on the date of
   publication of this document.  Please review these documents
   carefully, as they describe your rights and restrictions with respect
   to this document.  Code Components extracted from this document must
   include Simplified BSD License text as described in Section 4.e of
   the Trust Legal Provisions and are provided without warranty as
   described in the Simplified BSD License.

Table of Contents

   1. Introduction ....................................................3
   2. Terminology .....................................................4
   3. Client-to-Server (C2S) DNA ......................................4
      3.1. C2S Flow ...................................................4
      3.2. C2S Description ............................................5
   4. Server-to-Server (S2S) DNA ......................................5
      4.1. S2S Flow ...................................................6
      4.2. A Simple S2S Scenario .....................................10
      4.3. No Mutual PKIX Authentication .............................12
      4.4. Piggybacking ..............................................13
           4.4.1. Assertion ..........................................13
           4.4.2. Supposition ........................................15
   5. Alternative Prooftypes .........................................16
      5.1. DANE ......................................................16
      5.2. POSH ......................................................17
   6. Secure Delegation and Multi-Tenancy ............................18
   7. Prooftype Model ................................................18
   8. Guidance for Server Operators ..................................19
   9. IANA Considerations ............................................20
      9.1. POSH Service Name for xmpp-client Service .................20
      9.2. POSH Service Name for xmpp-server Service .................20
   10. Security Considerations .......................................20
   11. References ....................................................21
      11.1. Normative References .....................................21
      11.2. Informative References ...................................23
   Acknowledgements ..................................................24
   Authors' Addresses ................................................24

Saint-Andre, et al.          Standards Track                    [Page 2]
RFC 7712                        XMPP DNA                   November 2015

1.  Introduction
Show full document text